I’m a customer at a nationwide retail chain where the employees wear blue vests, usually with yellow smiley faces on them. I’m wearing black pants, a maroon hoodie, and a bluetooth headset, with a Discworld novel playing. I’m grabbing a quart of oil when another customer walks up to me.

Customer: *something I don’t catch, probably along the lines of “Can you help me?”*
Me: (pausing audiobook and taking out earbuds) I’m sorry?
Customer: Do you know where the speaker wire is?
Me: (points to the display of car stereo equipment not 20 feet away)
Customer: Yeah, but I was wondering if they had anything else.
Me: Damned if I know
Customer: (finally realizing) Oh, I thought you worked here, with the headset…